package tuxing;

public class Qiu extends Liti {
	double r;
	Qiu(double r){
		this.r=r;
	}
	public  double getbmj() {
		return 4*3.14*r*r;
		
	}
	public  double gettj() {
		return (4.0/3.0)*r*r*r;
	}


}
